Mold-forming mechanism.



No. 809,504. :PATBNTBD JAN. 9, 1906.

G. HENNINGSEN.

MOLD FORMING'MEGHANISM.

APPLICATION FILED SEPT.28, 1905.

3 SHEETSSHEET l.

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'No- 809,504. PATENTED JAN. 9, 1906. G. HBNNINGSBN. MOLD FORMINGMECHANISM.

APPLICATION FILED SEPT.28, 1905.

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witnesses fl PATENTED JAN. 9, 1906.

G. HENNINGSEN. MOLD FORMING MECHANISM.

APPLICATION FILED SEPT. 28, 1906.

3 SHEETS-SHEET 3.

aowentoz I UNITED STATES GEORGE HENNINGSEN,

PATENT OFFICE.

MOLD-FORMING MECHANISM.

Specification of Letters Patent.

Application filed September 28, 1905. Serial No. 280,444.

Patented Jan. 9, 1906.

,To all whom it may concern:

Be it known that I, GEORGE HENNINGSEN, a citizen of the United States,residing at Kimballton, in the county of Audubon and State of Iowa, haveinvented certain new and useful Improvements in Mold-Forming Mechanism,of which the following is a specification.

My invention relates to improvements in mold-forming mechanism for usein manufacturing cement tiles, more particularly the large tiles forculverts and wells.

The object of the invention is to provide a means for reducing orenlarging the inner mold and means for removal of the outer and innermold from the tile after the tile has been formed. The invention alsointroduces I an economy in material used for constructing the molds. Informing tiles of the above class a large number of molds are employed,and on account of the mechanism employed sheet-iron may be used insteadof a more costly material.

The invention also has reference to a method of forming convex andconcave end walls for tiles.

lVith these and other objects in view the invention presents a novelconstruction and arrangement of parts, as fully described herein andillustrated by the drawings, wherein Figures 1 and 2 represent,respectively, a

'plan view and a bottom view of the adjustable inner mold and mechanismcontained therein. Fig. 3 represents a vertical sectional view of Fig. 1bisected on the line a, b, c, d, and c with part-torn-away portions toillustrate structural arrangement of parts. Figs. 4 and 6 are horizontalviews of the vertical brackets 7 with arms 8 and 9, shown in Fig. 3, toillustrate method of forming the same. Fig. 5 is an enlarged detail toillustrate formation of flanges 3, 4, and 5, shown in Fig. 1. Fig. 7represents a perspective view of the outer mold. Fig. 8 is a detail ofFig. 7 to illustrate fastening means. Fig. 9 represents a plan view ofthe inner and outer mold and concave end mold. Fig. 10 is a verticalsectional view of Fig. 9 bisected on the line i, j. Fig.11 is a bottomview of a portion of the convex or lower molding-rim. Figs. 12 and 13are perspective views of por tions of the upper and lower molding-rims,and Fig. 14 represents a side elevation of the cover for the inner mold.

5 It is desirable after the cement has been prepared to form the tilesquickly, and for this purpose the devices for forming the tile should beunder ready control and convenient, and consequently the inventionpresents means of adjustment as a part of the molds. Sheet-iron or metalof similar character is used for both the inner and outer molds, thesurfaces that contact with the cement being smooth. After the tile hasbeen formed it is simply a hollow cylinder with side walls of uniformthickness, the upper end wall having a curved or depressed groove andthe lower end wall having a rounded finish, so that when tiles of equalsizes are placed end to endor one upon the other, as in a culvert orwell, the ends are adapted to be accurately joined. In the matter ofmounting the devices within the inner mold a heavy soldering orbrazingshould be resorted to, and if perforations of this mold are made toreceive rivets the fitting of the rivet-heads should be countersunk, sothat the outside surface will remain smooth; but in practice I findbrazing or soldering to be preferred, and therefore I have presented byFigs. 4 and 6 a method of cutting brackets which is useful where thinmetals are employed adapted to receive soldering.

I form an-inner hollow circular mold 6, having the inner and outer walls1 and 2, using for this purpose a sheet of rectangular form, and uponthe ends thus brought together I form thefianges 3 and 4, Figs. 1, 2, 5,and near flange 4 upon the inner wall 1 is rigidly mounted the flange 5.These flanges continue the entire width of the plate which constitutesthe inner mold and after being suitably hooked together produce acircular mold adapted to have a varying diameter. Upon the inner wall 1are rigidly mounted brackets 7, Fig. 6, the arm 8 thereof being rigidlyadherent to the wall 1 and arm 9 thereof extending toward the center ofthe mold to form a support for the links 10. I find it an advantage toform the bracket of one integral sheet, as shown by Fig. 4, and make anincision, as upon the broken linef g, and bend the leaf 11 toward thecenter of the sheet to a right angle, as upon the line 9 h, the leaf 11being then made rigidly adhesive to the arm 9 to form a pivotal bearingfor the outer ends of links 10. I construct the shaft 12, placed at thecenter of the inner mold 6 and parallel with wall 1, and in order toafford a convenient central pivotal bearing for links 10 I form thecones 13 and 14, the bases 15 and 16 supplying the pivotal bearings 17and 18 for the inner ends of links 10, the plates 19 extendinghorizontally and parallel with and beneath the bases of the cones, sothat the pivotal mounting of the several links may be in true alinement,also to afford a suitable continuous slot 20, within which the innerends of links 10 may rotate.

By the construction described the links 10 have a pivotal mounting attheir outer ends at 21 upon leaves 11 of brackets 7, and for thismounting I employ the rods 22. The rods 22 connect the two leaves 11 ofbrackets 7 and extend parallel with the lengthwise wall 1 of the innermold.

I construct the clasp 23, hingeably mounted at 25 upon the base 16 ofthe upper cone, adapted to catch within any one of the pockets 24, Figs.1, 9.

The shaft 12 extends as far as the lower end of mold 6, and when theparts are in operative position the lower end of shaft 12 rests upon thesame level foundation as mold 6. Shaft 12 therefore acts as a supportfor the central weight of the cones and links, the upper end of theshaft terminating in the angularly-extending handles 26, and since theshaft and cones are of metal and of preferably heavy construction theyaflord sufficient momentum to cause the links to move readily.

It will be understood from the description that the handles 26 may berevolubly moved to rotate the shaft 12 in either direction, carryingtherewith the links 10, and that a slight rotating movement will besufficient to cause the mold 6 to be of greater or lesser diameter, andthisis a desired object in order to form the body of a tile of greateror lesser thickness, and after manipulation ofhandles 26 flange 3 ismade to engage flange 4 or 5, as desired, the clasp 23 being placedwithin one of the pockets 24 to prevent sidewise movement of the links.

I construct a circular outer mold 27, Figs. 7, 8, 9, 10, of greaterdiameter than mold 6 by using a single sheet of iron provided with bentparallel flanges 28 and 29 at the ends of the sheet, and upon eachflange I pivotally mount' a convenient clasp 30, so that each clasp mayengage the opposite flange to cause a ready engagement or disengagementof these flanges, as shown in Figs. 7 and 8.

The outer and inner molds are of substantially the same height, and inoperation, both molds having been locked by their respective hooks andclasps, mold 6 is placed vertically within mold 27, equally spaced apartat their lower ends by the circular ring mold 31, Figs. 10, 11, 13,placed between them. This ring mold is provided with a concave uppersurface and with a slot 32, Fig. 11 adapted to accommodate the entrancetherein on occassion of flange 4, and the cover 33, Fig. 14, being firstpositioned upon the inner mold cement is placed between the molds tofill the entire space 34, Fig. 10. The cover 33 is then removed, andring mold 35, Fig. 12, having a convex lower surface, is pressed betweenthe molds upon the cement. The lastnamed ring mold is provided withhandles 36 to enable the operator to cause it to have a rotatingmovement upon the upper surface of the cement, thereby settling thewhole mass and equally spacing apart the upper walls of the molds. Iemploy varying widths of ring molds to correspond with the adjustmentsmade of flanges 3, 4, and 5 in forming tiles of varying thickness fordifferent uses, and this variation and the number of such flanges uponthe inner wall of mold 6 may be increased as desired. After the tile hasbeen formed it is released from the outer mold by reversing the clasps30 and from the inner mold by reversing the lever or handles 26, firsthaving raised clasp 23. The handles 26, shaft 12, and cones l3 and 14,as well as the links 10 and their pivotal bearings, are heavilyconstructed. The surfaces 8 of the brackets 7 are broadly formed, sothat their degree of adherence to the brackets is sufficient towithstand the momentum from the rotation of the combined shaft andcones, and any slight inequality of surfaces upon the inner mold orlengthwise seam formed in the outer wall 2 of the inner mold by flange 3which might operate to cause slightly-uneven surfaces upon the innerwall of the cement tile will form no substantial obstruction to therotating movement of the parts, but will be readily overcome by themomentum of the heavier parts while driving the handle revolubly, asfound by experience, and it is found that the sheet-iron or other metalhaving an attenuation similar thereto is entirely adequate for forminglarge tiles and is effectively controlled by the mechanism employed.

Various minor details of construction may be varied without departingfrom the scope of the invention, as is obvious.

What I claim as my invention is 1. Mold-forming mechanism, incombination, comprising an inner mold 6 and an outer mold 27; said innermold having a central rotatable shaft 12, and rigidly-mounted brackets 7mounted upon the inner wall 1 of said mold; the plate 16 rigidly mountedupon said shaft; the links 10 pivota1lymount ed upon said brackets 7 andupon said plate 16; the flanges 3 and 4 adapted to make engagement onewith the other; the clasp 23 adapted to make engagement with eyes 24;the handles 26; the cover 33; the rim-molds 31 and 35; said outer moldhaving the flanges 28 and 29 and clasps 30 substantially as shown anddescribed.

2. Mold-forming mechanism, in combination, comprising an inner mold 6and an outer mold 27 said inner mold having a central rotatable shaft12, and rigidly-mounted brackets 7 mounted upon the inner Wall 1 of edto make engagement with flange 3; the said mold; said brackets beingformed of inclasp 23 adapted to make engagement with tegral andsubstantially rectangular sheets eyes 24; the handles 26 the cover 38;said I 5 of metal incised substantially upon the lines rim-mold 31having the slot 32; said outer 5 f g to form leaves 11 adapted to beused as mold having the flanges 28 and 29 and clasps pivotal bearingsfor said rods 22; the plate 30, substantially as shown and described. 16rigidly mounted upon said shaft; the In testimony whereof I affix mysignature links 10 pivotally mounted upon leaves 11 of in presence oftwo Witnesses.

brackets 7 the opposite end of said links be- GEORGE HENNINGSEN. 1o ingpivotally mounted upon said plate 16; Witnesses:

the flanges 3. and 4 adapted to make engage- T. G. JENSEN,

ment'one with the other; the flange 5 adapt- J. J. ESBECH.

